#645F88

#645F88

Color Values

HEX

#645F88

RGB

100, 95, 136

HSL

247.3, 17.7%, 45.3%

HSV

247.3, 30.1%, 53.3%

CMYK

26.5%, 30.1%, 0.0%, 46.7%

OKLCH

0.5067 0.0646 289.5

Properties

Cool Dark Nearest: RAL 4011 Pearl Violet

Color Harmonies

Complementary

#645F88

#83885F

Analogous

#5F6F88

#785F88

#645F88

Triadic

#645F88

#88645F

#5F8864

Split Complementary

#645F88

#88785F

#6F885F

Tetradic

#645F88

#885F6F

#83885F

#5F8878

Color Blindness Simulation

Original

#645F88

Protanopia

#62627E

Deuteranopia

#62627C

Tritanopia

#647675

Achromatopsia

#636363

CSS Usage

background-color: #645F88;
color: #645F88;
border-color: #645F88;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F6F9
100
#EBEAF0
200
#D7D5E2
300
#BAB7CD
400
#9490B1
500
#6E6996
600
#585478
700
#474360
800
#37344B
900
#2B2938
950
#1B1A23

Contrast Checker

Text on white

5.94:1

AA Pass AAA Fail

Text on black

3.53:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026